Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3feda74980f81a861c4418bcde15e667804ff70796bdad017c8c41510050c41c' 
  AND token = 'lphYZ8UyBuNsAQOn6An0rWhAiPWRExNbHhgtH0VR2FQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}